The Fatro Compact reverse osmosis system is available in three performance versions. Despite their small dimensions, these are fully-fledged reverse osmosis systems that meet high requirements in a small space. The devices are adaptable and can be operated in various configurations. For example, the production of pure water in a storage tank "offline operation" or pressure tank "online operation" can be realized appropriately. The control system integrated in the Fatro Compact line permanently monitors the water quality. Furthermore, lights on the front indicate the current operating status.